MSI_000033333

Unreliable

排名分数: 2.21
参考来源: Posidonia oceanica (PO:0005352: xylem)

M/z: 329.1321
Mass Window: 329.1321 ~ 329.1321 (none)

参考注释

Dhurrin_[M+NH4]+ (BioDeep_00000014818)
(2S)-2-(4-hydroxyphenyl)-2-{[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}acetonitrile

Formula: C14H17NO7 (311.1004972)
SMILES: OC[C@H]1O[C@@H](O[C@H](C#N)C2=CC=C(O)C=C2)[C@H](O)[C@@H](O)[C@@H]1O

Dhurrin is a cyanogenic glycoside occurring in plants. Its biosynthesis has been elucidated. Dhurrin is hydrolyzed in the stomach of an insect into a carbohydrate and aglycone. The aglycone is unstable and releases hydrogen cyanide. (Wikipedia) In biosynthesis of the cyanogenic glucoside dhurrin in Sorghum bicolor, the UDP-glucosyltransferase UGT85B1 catalyzes the conversion of p-hydroxymandelonitrile into dhurrin. (PMID: 16169969) In Sorghum, the cyanogenic glucoside dhurrin is derived from l-tyrosine in a pathway involving the two cytochromes P450 (CYPs) CYP79A1 and CYP71E1, a glucosyltransferase (UGT85B1), and the redox partner NADPH-dependent cytochrome P450 reductase (CPR). (PMID: 21620426) Synthesis of the tyrosine derived cyanogenic glucoside dhurrin in Sorghum bicolor is catalyzed by two multifunctional, membrane bound cytochromes P450, CYP79A1 and CYP71E1, and a soluble UDPG-glucosyltransferase, UGT85B1. In the presence of CYP79A1 and CYP71E1, the localization of UGT85B1 shifted towards the surface of the ER membrane in the periphery of biosynthetic active cells, demonstrating in planta dhurrin metabolon formation. (PMID: 17706731)